Solve for x
x=-3y
Solve for y
y=-\frac{x}{3}
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-\frac{1}{3}x=y
Swap sides so that all variable terms are on the left hand side.
\frac{-\frac{1}{3}x}{-\frac{1}{3}}=\frac{y}{-\frac{1}{3}}
Multiply both sides by -3.
x=\frac{y}{-\frac{1}{3}}
Dividing by -\frac{1}{3} undoes the multiplication by -\frac{1}{3}.
x=-3y
Divide y by -\frac{1}{3} by multiplying y by the reciprocal of -\frac{1}{3}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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